Financing Receivables - Past Due (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Past Due Financing Receivable
Amortized cost	$ 11,821	$ 13,769
Client Financing Receivables
Past Due Financing Receivable
Amortized cost	10,705	12,531
Amortized Cost Not Accruing	124	137
Impaired financing receivables, related allowance	121	122
Client Financing Receivables | Financial Asset, Equal to or Greater than 90 Days Past Due
Past Due Financing Receivable
Amortized cost	200	344
Amortized Cost > 90 Days and Accruing	78	208
Billed Invoices > 90 Days and Accruing	8	23
Client Financing Receivables | Americas
Past Due Financing Receivable
Amortized cost	6,317	7,281
Amortized Cost Not Accruing	77	74
Client Financing Receivables | Americas | Financial Asset, Equal to or Greater than 90 Days Past Due
Past Due Financing Receivable
Amortized cost	147	272
Amortized Cost > 90 Days and Accruing	72	198
Billed Invoices > 90 Days and Accruing	6	22
Client Financing Receivables | Europe/Middle East/Africa
Past Due Financing Receivable
Amortized cost	3,019	3,546
Amortized Cost Not Accruing	31	46
Client Financing Receivables | Europe/Middle East/Africa | Financial Asset, Equal to or Greater than 90 Days Past Due
Past Due Financing Receivable
Amortized cost	35	52
Amortized Cost > 90 Days and Accruing	4	8
Billed Invoices > 90 Days and Accruing	1	1
Client Financing Receivables | Asia Pacific
Past Due Financing Receivable
Amortized cost	1,370	1,704
Amortized Cost Not Accruing	16	17
Client Financing Receivables | Asia Pacific | Financial Asset, Equal to or Greater than 90 Days Past Due
Past Due Financing Receivable
Amortized cost	17	20
Amortized Cost > 90 Days and Accruing	2	3
Billed Invoices > 90 Days and Accruing	$ 1	$ 1